Table 2.

Training duration and current settings

	Training duration (minutes)			Current (mA)
Subject	Week 1	Week 2	Week 3	R-EO	R-RA	L-RA	L-EO
S1	60	120	180	50	40	40	50
S2	80	160	240	70	60	60	70
S3	80	90	240	60	50	50	60
S4	90	230	475	80–100	50	50	90–100
S5	80	140	190	80–100	80–100	120	120
S6	80	200	190	30–40	0–30	15–35	20–40
S7	80	160	240	30	30	30	35
S8	60	160	230	45	40	45	30
S9	100	150	240	40	40	35	30
S10	80	160	200	100	50	50	80
S11	80	160	240	120	120	100	100
S12	80	165	240	120	120	100	100
Mean	180	158	241
SD	11	34	77

SD, standard deviation; R-EO and L-EO, right and left external oblique muscles; R-RA and L-RA, right and left rectus abdominis muscles.